Plastic bags, paper straws (wrapped in plastic), most realities of recycling, vehicle selections, etc.
Leads to a lot of unpopular things.
Have you walked a beach in the last decade?
Finally, most of the (local, not even thinking about the developing world) pollution is not deliberate. It blows in from other places, usually. I live rural and I'm continually picking up plastic garbage from my ditch or back forest or fields that blows in from the nearby highway and roads, especially after garbage pickup day.
Production needs to be severely curtailed.
Ultimately, individual habits do add up. But with climate, one would be hard pressed to find evidence that conservation is the path forward. It does not work, unfortunately.